RPM's

As far as the curve is concerned, that's up to you on the spring selection, if it 'feels' better then go with it, if not swap back. It's one of those things you gotta play with to get right.

In fact, the whole timing curve and carb tune is one of those things you've got to 'feel' what it likes, you keep going till it doesn't like what your giving it, then back it off.

Make sure to check your vacuum advance setting as this is damn important to get good mileage! 48-52 total by the time it quits pulling. Ported vacuum works best on my setup, manifold feels spongy. You can adjust the canister with a 3/32? allen wrench inserted into the vacuum port on the canister, 1 turn is 1HG, clockwise add, counter-clockwise subtract.

Your on the right track with the carb, I still think you should check the plugs; hell pull em' after it cools down and look at the base ring, if it has 1 full turn of color your good. I know you can get real anal about reading spark plugs, but you can get close by just scoping them out at your leisure.


What carb are you running?